Improvement in curtain-fixtures



N. CAMPBELL.

Improvement in Curtain-Fixtures.

No. 130,977. Patented Sep.3,1872.

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, @UIZQ 11M PHOTO-LITHFGMP/l/ M A f/OSBORNE: PROCESS) UNITED STA Es NATHAN CAMPBELL, OF ROCHESTER, NEW YORK.

IMPROVEMENT IN CURTAIN-FIXTURES.

Specification forming part of Letters Patent No. 130,977, dated September 3, 1872.

SPECIFICATION.

Be it known that I, NATHAN CAMPBELL, of

Rochester, in the county of Monroe and State of New York, have invented certain Improve-' merits in Curtain-Fixtures, of which the following is a specification:

My invention relates to that class of curtainfixtures in which the movements of the supporting-roller are controlled by a single elevating-cord at the side of the window; and it consists more especially in a peculiar method of locking and unlocking said roller by means and connected parts.

A represents the roller-bracket arranged to be attached to the window-casing in the usual manner. B is the curtain-roller provided with the spool 0, around which the elevating-cord e is wound, and the ratchet D. E is a bent pawl-lever extending over the ratchet, as indicated in Fig. 2, and is provided with a counter-weight, F, at its extremity. This lever is pivoted to the bracket at the point D so as to swing easily, and a lateral projection upon its lower end has a-slot, d, in it, through which the cord 6 passes. A projecting toe, a, just above the pivot 12', locks into the teeth of the ratchet, as indicated in Fig. 2; and when the parts are in such locked position the cord-slot d is somewhat within a vertical line dropped from thewinding side of the spool G. v

-It will be observed that, by the peculiar shape of' the lower end of the lever E and arrangement of the counter-weight, F, nearly all the effective weight of those parts are brought to bear uponthe toe a, thus allowing them to be very light. The counter-weight,also, be-

ing further from the center 1) than the toe, the pressure upon the latter is thereby increased.

To raise the curtain, a pullis given upon the cord 0 in the usual-mannen To lower it, the cord is pulled lightly, the lever E being drawn into the position indicated by dotted lines 0 in Fig. 2, thereby lifted from the ratchet. If, now, the cord is allowed to run through the hand, a slight pressure only being exerted up on it, the curtain will descend by its own gravity, the cord winding upon the spool. Upon the entire release of the cord the counterweight F causes the toe to to lock into the ratchet and retain the curtain. The rear edge of the lever E is provided with a fullness at c, seen in Fig. 2, which limits the throw of the lever in that direction by coming in contact with the flange f of the bracket. The movement of the lever is made just sufficient to allow the toe a to clear the ratchet, whereby the parts are in position to lock instantaneously when the cord is released. obviates the necessity of a special stop upon the bracket.

A friction-wheel may be substituted for the ratchet, if desired.

It will be observed that my improved fixture is very simple in its construction and direct and positive in its action, is not liable to get out of order, and is easily operated.

What I claim as my invention, is-

The bent pawl-lever E, with or without the stop 0, provided with the counterweight F, toe a, and the cord-slot or loop 11, in combination with the ratchet D and cord e acting con; jointly, as and for the purposes shown and described.

' N. CAMPBELL.

Witnesses WM. S. LOUGHBOROUGII, A. MANDEvILLn.

This construction 

